* remove io::ostream dependency from CString.h + clang tidy * remove ostream.h dependency from Invocable.h * remove Panic.h dependency from FixedCapacityVector.h * remove ostream.h dependency from backend/ headers * clang tidy Panic.h/Panic.cpp
* remove io::ostream dependency from CString.h + clang tidy * remove ostream.h dependency from Invocable.h * remove Panic.h dependency from FixedCapacityVector.h * remove ostream.h dependency from backend/ headers * clang tidy Panic.h/Panic.cpp